HOW TO INSTALL CROWN AND UNIVERSAL BIRDSMOUTH HORIZONTAL RAILING TREX TRANSCEND ®
Attaching Adapters Snap adapters into RSBs.
NOTES: » IMPORTANT - 6' and 8' rails cannot be installed at full spans when using Birdsmouth applications. Rail posts must be spanned less than 6'or 8' OC. » Use with 4 x 4 post sleeve ONLY . » G askets are only designed for use with Transcend crown and universal railing.
Pre-drill Bottom and Top RSBs
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Read all instructions BEFORE installation.
PARTS
2. Position RSBs with adapter (flat side DOWN) for lower rail, mark and pre-drill screw holes with 1/8" (3 mm) drill bit on post. 3. Position RSBs with adapter (flat side UP) for top rail, mark and pre-drill screw holes with 1/8" (3 mm) drill bit on post.
Adapter
Top bracket
Measuring and Cutting Rails
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Adapter
Bottom bracket
4. Measure from corner-to-corner between posts. Mark 45° cuts on rails with template on assembly tool. Center of “V’s” is the distance from corner-to-corner for posts.
Mark Posts 1. Measure and mark 4" (102 mm) and
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NOTE: Subtract 1/16" (1.6 mm) from each end to accommodate rail gaskets.
33-9/16" (852 mm) up from top of post skirt. For a 42"(106.7 cm) rail, top mark is 39-9/16" (100.5 cm) on post.
33-9/16" (852 mm) for 36" (914 mm) or 39-9/16" (100.5 cm) for 42"
4" (102 mm)
NOTE: Without skirt, add 1-1/2" (38 mm) to measurements.
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Have Questions? 1–800–BUY–TREX
NOTE: Construction methods are always improving. Please ensure you have the most up-to-date installation instructions by visiting: trex.com
THR-0825
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